Black crystal liner. The black crystal liner has the advantages of high strength, wear resistance and corrosion resistance, and the surface is made of high-strength alloy material, which can withstand greater pressure and heat. In addition, the heating speed of the black crystal liner is faster than that of the enamel liner, so that food can be cooked faster. The durability of enamel liner is poor. Improper use or being hit by hard objects will cause the enamel layer to fall off, which will affect the service life of the liner, so it is a good black crystal liner.